Single evaporation process, source needs reloading after each evaporation

Thicker layers can be built up by using multiple threads or braids. Often limited by the power
supply and leads to breaking vacuum and reloading source for multiple layers.

Considering the above features, it is clear that using pre-shaped rods with the
correct controls system (pulse, continuous and auto-cycle modes) delivers not only
the better quality carbon layer but also give much better control over the thickness
of the carbon layer.

Note: The quality of the carbon coating depends on the vacuum system used
when evaporating the carbon. In a turbo pumped high vacuum system (typical 10-5
mbar range or better) the carbon is deposited a virtually amorphous structure not
resolvable by SEM or FESEM imaging. This type of coater needs to be used for FESEM,
Microprobe, EBSD and TEM applications. For standard SEM/EDS applications a much
simpler system can used, utilizing a rotary vane pumping system delivering a vacuum
level of 10-3 mbar. At these vacuum levels the carbon layer has a structure,
which can be revealed at magnifications of approx 25,000x.
go to Carbon Rods for Evaporation
go to Carbon Fiber for Evaporation

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Possible carbon pointed rod shapes and their setups. The top illustration, with
neck rods, is usually preferred.